So I bought my WK from a private party and after she signed the title over to me, I went to fill it up as the gas gauge said it was low. Get to gas station, tank filled and went to start up Jeep only to find the gas gauge hasn't moved off the mark showing I have a 1/4 tank left. I've gone through a few tanks now and the needle hasn't moved.

Been filling up every 170-190 miles because I have no clue how much gas is really in there and when I commute 40 miles one-way to work everyday, it adds up.

Check the battery. Coupling the random dying issue with the electrical problem, I'd definitely get the battery tested. These WKs are known to be REALLY PICKY with voltages! Even if the WK starts all the time, doesn't mean your battery is up to spec.

Seriously, I'd check every cable in that thing. Battery posts, ground cables, etc.
Particularly the main ground out on the passenger side.

If you find an aftermarket tow adapter, pull the whole backend apart and fix any damage the typical installer does. Same for any aftermarket security alarms/disablers. Drop it on a lift and look for any pinches, etc. around the tank, but the issue could as well be a loose connector pretty much anywhere including just behind the dash.

Having a problem with my truck filled tank up to 3/4 tank full now I'm at less then a 1/4 only drove it twice less the 20 mil and the evic gauge goes down 2 miles every 2 to 3 mins even when I'm at a full stop